具有双位点氧化物路径的高 RuO2催化剂,用于持久的酸氧演化反应
Fangren Qian1,2,3, Dengfeng Cao1, Shuangming Chen4
1National Synchrotron Radiation Laboratory, State Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui, China.
Nature communications
|July 27, 2025
概括
开发持久的酸氧演化反应催化剂对于水电解剂至关重要. 将高原子纳入RuO2增强了稳定性,并使新的催化机制能够提高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 持久的酸氧演化反应 (OER) 催化剂对于工业质子交换膜水电解器至关重要.
- 当前的OER催化剂在苛刻的操作条件下经常面临稳定性挑战.
研究的目的:
- 开发用于质子交换膜水电解器的高度稳定和高效的OER催化剂.
- 阐明新型高原子改性RuO2催化剂的催化机制.
主要方法:
- 高原子 (Co,Ni,Cu,Mn,Sm) 通过回火将其纳入RuO2 (RuO2-HEAE) 中.
- 在现场微分电化学质谱 (DEMS) 和操作减弱总反射表面增强红外吸收光谱 (ATR-SEIRAS).
- 定量福里埃转换扩展X射线吸收细结构 (FT-EXAFS) 配件和密度函数理论 (DFT) 的计算.
主要成果:
- RuO2-HEAE具有显著的稳定性 (>1500小时在100 mA cm-2下).
- 观察到从吸附物演化机制 (AEM) 转向双位氧化物通路机制 (OPM) 的机理性转变.
- 在RuO2-HEAE的第二个协调中,延长的Ru-M距离促进了直接的O-O合.
结论:
- 该OPM类型的RuO2-HEAE催化剂表现出卓越的耐用性 (在1 A cm-2下约1500小时),超过了大多数报告的基于RuO2的催化剂.
- 这项研究为设计用于质子交换膜水电解的高度稳定的催化剂提供了基本的见解.
- 这些发现为高效气生产的先进催化剂设计铺平了道路.
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